Reply to thread

Message

<blockquote data-quote="Mars Warrior" data-source="post: 40007" data-attributes="member: 10351">I have checked once more power consumption of harddisks and DVD drives as these components seem to have startup power draws that make it necessary to have a &quot;beefy&quot; PSU.1. Harddrive:This story, <a href="http://www.digit-life.com/articles2/storage/hddpower.html" target="_blank">HDD Diet: Power Consumption and Heat Dissipation</a> shows that startup power can be as much as 30W, while normal operation is just 10W, meaning at least 20W headroom!2. DVD Drive:Same story as for the harddrive, max power consumption can be as high as 30W during startup while normal operation is about 10-15W. Again this means at least 20W headroom!In addition, the guys at <a href="http://www.mini-itx.com/store/?c=10#p1816" target="_blank">mini-itx</a> simply warn for DVD drives in combination with a 80W PSU: &quot;These 80W PSU kits are suitable for use with any EPIA Mini-ITX motherboard, 3.5in hard drive (or 2.5in hard drive) and a slimline optical drive - full size CD drives draw a lot of power and will damage this board&quot;.They have however also a 150W PSU (replaces the 120W they had), which has no problem in handling the startup power consumption of a DVD and Harddisk: &quot;You may use a full size optical and standard 3.5in hard drive with this kit.&quot;So, in short: Although your system could draw only 60-80W during full load, you should have about 40W of headroom to make sure your Harddisk and DVD drive will spin up, ie around 120W in this case. Adding some USB devices or other stuff (TV Cards for a HTPC for instance) means the PSU is just enough. This seems to be the reason that mini-itx replaced their 120W PSU with a 150W PSU, which is great for me at least&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue&nbsp; &nbsp; :p" loading="lazy" data-shortname=":p" /></blockquote>

[QUOTE="Mars Warrior, post: 40007, member: 10351"] I have checked once more power consumption of harddisks and DVD drives as these components seem to have startup power draws that make it necessary to have a "beefy" PSU. [b]1. Harddrive:[/b] This story, [url=http://www.digit-life.com/articles2/storage/hddpower.html]HDD Diet: Power Consumption and Heat Dissipation[/url] shows that startup power can be as much as 30W, while normal operation is just 10W, meaning at least 20W headroom! [b]2. DVD Drive:[/b] Same story as for the harddrive, max power consumption can be as high as 30W during startup while normal operation is about 10-15W. Again this means at least 20W headroom! In addition, the guys at [url=http://www.mini-itx.com/store/?c=10#p1816]mini-itx[/url] simply warn for DVD drives in combination with a 80W PSU: "[i]These 80W PSU kits are suitable for use with any EPIA Mini-ITX motherboard, 3.5in hard drive (or 2.5in hard drive) and a slimline optical drive - full size CD drives draw a lot of power and will [b]damage[/b] this board[/i]". They have however also a 150W PSU (replaces the 120W they had), which has no problem in handling the startup power consumption of a DVD and Harddisk: "[i]You may use a full size optical and standard 3.5in hard drive with this kit[/i]." So, in short: Although your system could draw only 60-80W during full load, you should have about 40W of headroom to make sure your Harddisk and DVD drive will spin up, ie around 120W in this case. Adding some USB devices or other stuff (TV Cards for a HTPC for instance) means the PSU is just enough. This seems to be the reason that mini-itx replaced their 120W PSU with a 150W PSU, which is great for me at least :P [/QUOTE]

Verification